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LQ Newbie
Registered: Jul 2003
Posts: 4
Rep: 
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Not working serial port
Hi, I just moved away from Mandriva2006 into Ubuntu i386 Server 6.06LTS on a Via EPIA cl6000 with four serial ports which worked like a dream on Mandriva. On Ubuntu only ttyS0 works
root@fw# ll /dev/ttyS*
0 crw-rw---- 1 root dialout 4, 64 2006-10-31 19:31 /dev/ttyS0
0 crw-rw---- 1 root dialout 4, 65 2006-10-31 19:31 /dev/ttyS1
0 crw-rw---- 1 root dialout 4, 74 2006-10-31 19:31 /dev/ttyS10
0 crw-rw---- 1 root dialout 4, 75 2006-10-31 19:31 /dev/ttyS11
0 crw-rw---- 1 root dialout 4, 76 2006-10-31 19:31 /dev/ttyS12
0 crw-rw---- 1 root dialout 4, 77 2006-10-31 19:31 /dev/ttyS13
0 crw-rw---- 1 root dialout 4, 78 2006-10-31 19:31 /dev/ttyS14
0 crw-rw---- 1 root dialout 4, 79 2006-10-31 19:31 /dev/ttyS15
0 crw-rw---- 1 root dialout 4, 80 2006-10-31 19:31 /dev/ttyS16
0 crw-rw---- 1 root dialout 4, 81 2006-10-31 19:31 /dev/ttyS17
0 crw-rw---- 1 root dialout 4, 82 2006-10-31 19:31 /dev/ttyS18
0 crw-rw---- 1 root dialout 4, 83 2006-10-31 19:31 /dev/ttyS19
0 crw-rw---- 1 root dialout 4, 66 2006-10-31 19:31 /dev/ttyS2
0 crw-rw---- 1 root dialout 4, 84 2006-10-31 19:31 /dev/ttyS20
0 crw-rw---- 1 root dialout 4, 85 2006-10-31 19:31 /dev/ttyS21
0 crw-rw---- 1 root dialout 4, 86 2006-10-31 19:31 /dev/ttyS22
0 crw-rw---- 1 root dialout 4, 87 2006-10-31 19:31 /dev/ttyS23
0 crw-rw---- 1 root dialout 4, 88 2006-10-31 19:31 /dev/ttyS24
0 crw-rw---- 1 root dialout 4, 89 2006-10-31 19:31 /dev/ttyS25
0 crw-rw---- 1 root dialout 4, 90 2006-10-31 19:31 /dev/ttyS26
0 crw-rw---- 1 root dialout 4, 91 2006-10-31 19:31 /dev/ttyS27
0 crw-rw---- 1 root dialout 4, 92 2006-10-31 19:31 /dev/ttyS28
0 crw-rw---- 1 root dialout 4, 93 2006-10-31 19:31 /dev/ttyS29
0 crw-rw---- 1 root dialout 4, 67 2006-10-31 19:31 /dev/ttyS3
0 crw-rw---- 1 root dialout 4, 94 2006-10-31 19:31 /dev/ttyS30
0 crw-rw---- 1 root dialout 4, 95 2006-10-31 19:31 /dev/ttyS31
0 crw-rw---- 1 root dialout 4, 96 2006-10-31 19:31 /dev/ttyS32
0 crw-rw---- 1 root dialout 4, 97 2006-10-31 19:31 /dev/ttyS33
0 crw-rw---- 1 root dialout 4, 98 2006-10-31 19:31 /dev/ttyS34
0 crw-rw---- 1 root dialout 4, 99 2006-10-31 19:31 /dev/ttyS35
0 crw-rw---- 1 root dialout 4, 100 2006-10-31 19:31 /dev/ttyS36
0 crw-rw---- 1 root dialout 4, 101 2006-10-31 19:31 /dev/ttyS37
0 crw-rw---- 1 root dialout 4, 102 2006-10-31 19:31 /dev/ttyS38
0 crw-rw---- 1 root dialout 4, 103 2006-10-31 19:31 /dev/ttyS39
0 crw-rw---- 1 root dialout 4, 68 2006-10-31 19:31 /dev/ttyS4
0 crw-rw---- 1 root dialout 4, 104 2006-10-31 19:31 /dev/ttyS40
0 crw-rw---- 1 root dialout 4, 105 2006-10-31 19:31 /dev/ttyS41
0 crw-rw---- 1 root dialout 4, 106 2006-10-31 19:31 /dev/ttyS42
0 crw-rw---- 1 root dialout 4, 107 2006-10-31 19:31 /dev/ttyS43
0 crw-rw---- 1 root dialout 4, 108 2006-10-31 19:31 /dev/ttyS44
0 crw-rw---- 1 root dialout 4, 109 2006-10-31 19:31 /dev/ttyS45
0 crw-rw---- 1 root dialout 4, 110 2006-10-31 19:31 /dev/ttyS46
0 crw-rw---- 1 root dialout 4, 111 2006-10-31 19:31 /dev/ttyS47
0 crw-rw---- 1 root dialout 4, 69 2006-10-31 19:31 /dev/ttyS5
0 crw-rw---- 1 root dialout 4, 70 2006-10-31 19:31 /dev/ttyS6
0 crw-rw---- 1 root dialout 4, 71 2006-10-31 19:31 /dev/ttyS7
0 crw-rw---- 1 root dialout 4, 72 2006-10-31 19:31 /dev/ttyS8
0 crw-rw---- 1 root dialout 4, 73 2006-10-31 19:31 /dev/ttyS9
Is it not strange that there is only one row on ttyS0 (which work) and 1-3 got several rows? switching back to my HD with Mandriva on shows only one row for each port and all works. Why is this?
root@fw# dmesg|grep ttyS
[17179575.992000] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[17179575.992000] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[17179575.992000] serial8250: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A
[17179575.992000] serial8250: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A
[17179576.000000] 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[17179576.000000] 00:09: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[17179576.000000] 00:0d: ttyS2 at I/O 0x3e8 (irq = 5) is a 16550A
[17179576.000000] 00:0e: ttyS3 at I/O 0x2e8 (irq = 10) is a 16550A
It look OK to me, no chared IRQ on any port, and address is correct.
root@fw# cat /proc/interrupts
CPU0
0: 223606 XT-PIC timer
1: 84 XT-PIC i8042
2: 0 XT-PIC cascade
7: 4 XT-PIC parport0
8: 4 XT-PIC rtc
9: 0 XT-PIC acpi
11: 78685 XT-PIC ehci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb4, eth0, eth1, VIA8233
12: 96 XT-PIC i8042
14: 3640 XT-PIC ide0
15: 76 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
Why don't I see any IRQ used here?
please any one, I want to stick with Ubuntu (allready using Debian on several SLUGS) but I need to get a hang of how to get back my four serial port. Thanks
//Tord
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